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Dispenser with movable matrix comprising a plurality of tiny pills

  • US 4,824,675 A
  • Filed: 07/13/1987
  • Issued: 04/25/1989
  • Est. Priority Date: 07/13/1987
  • Status: Expired due to Term
First Claim
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1. A dispenser for administering a beneficial agent formulation to an animal environment of use, the dispenser comprising:

  • (a) a wall that surrounds and defines an internal lumen, the wall comprising at least in part a semipermeable composition that is permeable to the passage of fluid and is substantially impermeable to the passage of a beneficial agent;

    (b) a plurality of tiny pills, the pills comprising;

    (1) a core of a beneficial agent; and

    (2) a wall that surrounds the beneficial agent;

    (c) means in the lumen comprising the plurality of timy pills, which means substantially maintains its physical and chemical integrity and is substantially nonmeltable in the lumen of the dispenser, said means a carrier for delivering the timy pills from the lumen over time;

    (d) means for occupying an increasing amount of space in the lumen for pushing the means comprising the tiny pills from the dispenser; and

    ,(e) a mouth in the dispenser comprising a cross-sectional dimension substantially equal to the cross-sectional dimension of the lumen for delivering the tiny pills to the environment of use.

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